Distracted

I'm sorry, can you please repeat for me
I swear that I was paying attention
The fact is I was temporarily
Thinking up a brand new life invention

It would be small, light and easy to hold
Be cheap enough every person could buy
Work in high temperatures and in the cold
Keep working until the day that you die

So it's robust and tough and versatile
Now I hear you ask "what does it do?"
I was on the verge of that insight while
I was distracted by listening to you

So, again, could you repeat what you said?
And I'll do my best to ignore my head.